Another Drone Thread...
Thread Starter
Racer
Joined: Sep 2014
Posts: 294
Likes: 119
Another Drone Thread...
I have a comprehensive build on my 93 Coupe find it here ( https://www.corvetteforum.com/forums...ld-thread.html) w/long tube headers, 3 inch exhaust, an x pipe, no cats and some MagnaFlow mufflers. The drone is pretty bad so I'm going to do something about it. My first thought it to throw a Corsa system at it. One issue with this is that I only need the mufflers (they don't seem to sell just mufflers). For the C4, Corsa only has 2.5 inch inlets for the C4. So I have a couple of questions. Is the neck down to 2.5 inches going to affect my system much? How tuned are the Corsa innards to a specific engine?
Team Owner
Joined: Sep 2003
Posts: 20,172
Likes: 672
From: Freedom is never more than one generation away from extinction.
St. Jude '03 thru '24
You've built a performance engine. Why be bothered with drone?
Just go to the Corsa catalogs and find a muffler that meets your specs. Doesn't need to be for a Corvette.
Just go to the Corsa catalogs and find a muffler that meets your specs. Doesn't need to be for a Corvette.
Thread Starter
Racer
Joined: Sep 2014
Posts: 294
Likes: 119
Melting Slicks
Joined: Oct 2012
Posts: 2,156
Likes: 273
From: Dunedin NZ.
I have a 3" cat back system on my '93. I believe its a Billy Boat system? Anyway the drone was quite bad around 1400 - 1700 rpm so as an experiment I made a couple of restrictors to reduce the internal diameter by 1/2 of one outlet on each side, this significantly reduced the drone and doesn't seem have affected the performance at least for normal street driving. The restrictors are located inside the exhaust where the tips change to round pipe and held in by a grub screw so that I can remove them easily.
Team Owner
Joined: Dec 2000
Posts: 21,094
Likes: 282
From: Phila., PA burbs
Unfortunately, Corsa doesn't sell mufflers only. They only sell complete exhaust systems for specific vehicle applications.
Safety Car
Joined: Jun 2010
Posts: 4,564
Likes: 1,676
Call Corsa up and talk to Jim (if he still works there) and let us k ow how hard he laughs. Cora’s only sells complete systems. They don’t want anybody cobbling up a bastardized system and then complaint and saying it is an issue with a Corsa component.
There is nothing wrong with using a Corsa on a high output motor. I’m pushing close to 500 at the wheel with headers/cats/Corsa.
Last edited by ChumpVette; Dec 29, 2019 at 03:51 PM.
Le Mans Master
Joined: Sep 2013
Posts: 6,192
Likes: 750
From: near the thumb in the mitten
IDK how well it will work in this application. You could install 3 inch flex pipes between headers and front pipes. These are the high temperature rubber with ss mesh shielding type, they are still cheap compared to new exhaust. The flex pipe works on single exhaust. Installing reducers isn't going to have a large effect on performance. They were common place in the pre cat days.
Thread Starter
Racer
Joined: Sep 2014
Posts: 294
Likes: 119
Call Corsa up and talk to Jim (if he still works there) and let us k ow how hard he laughs. Cora’s only sells complete systems. They don’t want anybody cobbling up a bastardized system and then complaint and saying it is an issue with a Corsa component.
There is nothing wrong with using a Corsa on a high output motor. I’m pushing close to 500 at the wheel with headers/cats/Corsa.
There is nothing wrong with using a Corsa on a high output motor. I’m pushing close to 500 at the wheel with headers/cats/Corsa.
Last edited by Jaye Bass; Dec 29, 2019 at 04:08 PM.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
Racer
Joined: Mar 2002
Posts: 498
Likes: 21
From: Maine
I have a Corsa exhaust system in the for sale section if your interested. https://www.corvetteforum.com/forums...t-14116-a.html
The Corsa system will handle all the power you can throw at it and no drone.
The Corsa system will handle all the power you can throw at it and no drone.
I have a comprehensive build on my 93 Coupe find it here ( https://www.corvetteforum.com/forums...ld-thread.html) w/long tube headers, 3 inch exhaust, an x pipe, no cats and some MagnaFlow mufflers. The drone is pretty bad so I'm going to do something about it. My first thought it to throw a Corsa system at it. One issue with this is that I only need the mufflers (they don't seem to sell just mufflers). For the C4, Corsa only has 2.5 inch inlets for the C4. So I have a couple of questions. Is the neck down to 2.5 inches going to affect my system much? How tuned are the Corsa innards to a specific engine?
Zen Vet Master Level VII
Joined: Mar 2016
Posts: 5,214
Likes: 1,173
From: Southlake, TX
http://www.zr1specialist.com/HAT%20W...%20Systems.pdf
This is a copy of a presentation that Marc Haibeck has done on the LT5 engine exhaust options on a ZR1. You may find something that makes sense for your application.
On my 91 ZR1, I put a set of Stainless Works headers and a full Corsa from headers to rear. I'm very happy and no drone.
This is a copy of a presentation that Marc Haibeck has done on the LT5 engine exhaust options on a ZR1. You may find something that makes sense for your application.
On my 91 ZR1, I put a set of Stainless Works headers and a full Corsa from headers to rear. I'm very happy and no drone.
Last edited by billschroeder5842; Dec 29, 2019 at 11:21 PM.
Zen Vet Master Level VII
Joined: Mar 2016
Posts: 5,214
Likes: 1,173
From: Southlake, TX
Team Owner
Joined: Sep 2003
Posts: 20,172
Likes: 672
From: Freedom is never more than one generation away from extinction.
St. Jude '03 thru '24
Melting Slicks
Joined: May 2018
Posts: 2,090
Likes: 599
From: Question Government
All this "chasing the drone" after customizing any exhaust is tiring, frustrating, and eventually expensive, compared to buying a Corsa system at the start! I'll do this for sure on my next future C5 Vette. On another subject regarding drone and the C4 clamshell window hatch area: I still believe a glass/plexiglass "bulkhead panel" placed behind the front seats (from floor to headliner) would create a drone-free cabin with most exhausts...somebody needs to fabricate this and test it out...not me.
Last edited by RetroGuy; Dec 31, 2019 at 10:56 AM.
Drifting
Joined: Jul 2009
Posts: 1,257
Likes: 98
From: Ashland PA
2021 C4 of the Year - Modified Finalist
You could try fabbing up some drone eliminators or resonance tubes. Thats what I ended up doing with my OBX system but it will restrict your exhaust.
https://www.corvetteforum.com/forums...tor-tubes.html
https://www.corvetteforum.com/forums...tor-tubes.html
Melting Slicks
Joined: May 2018
Posts: 2,090
Likes: 599
From: Question Government
You could try fabbing up some drone eliminators or resonance tubes. Thats what I ended up doing with my OBX system but it will restrict your exhaust.
https://www.corvetteforum.com/forums...tor-tubes.html
https://www.corvetteforum.com/forums...tor-tubes.html
